It's easy to get comfortable with a tried-and-true workout routine. But if it's results you want, you'll need to shake things up occasionally. "Changing your routine around every 4 to 6 weeks keeps muscles challenged so you continue to see results," says Tom Holland, MS, CSCS, author of Beat the Gym (William Morrow, 2011). Swap out your regular exercises with these moves to get more bang for your workout buck. Start with 2 sets and work up to 3 when it feels easy.
1. One-arm pull down (Works: back and biceps)
What you need: medium to heavy resistance tubing with a handle on one end
How to do it: Attach the end of exercise tubing high up on the door hinge above your head. Stand in a semi-lunge (for balance) with one foot about six inches in front and to the side of the other, knees slightly bent, and pull the handle straight down with one arm; pause and slowly return to starting position. Do 12 to 15 reps on each side.
Why you need it: A traditional rowing exercise using both arms at once allows the dominant side to take over, which can lead to injury, says Holland. This move strengthens muscles equally on each side of the spine, which reduces the risk of low-back pain.
MORE MOVES TO COME!!!! =)